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GB: More audio fixes

This commit is contained in:
Jeffrey Pfau 2016-02-11 00:10:18 -08:00
parent f1f9dee111
commit e97d36b7fc
1 changed files with 7 additions and 4 deletions
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11
src/gb/audio.c
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@ -98,6 +98,7 @@ void GBAudioWriteNR10(struct GBAudio* audio, uint8_t value) {
audio->p->memory.io[REG_NR52] &= ~0x0001;
}
}
audio->ch1.sweepOccurred = false;
audio->ch1.time = GBAudioRegisterSquareSweepGetTime(value);
if (!audio->ch1.time) {
audio->ch1.time = 8;
@ -381,6 +382,7 @@ void GBAudioWriteNR51(struct GBAudio* audio, uint8_t value) {
}
void GBAudioWriteNR52(struct GBAudio* audio, uint8_t value) {
bool wasEnable = audio->enable;
audio->enable = GBAudioEnableGetEnable(value);
if (!audio->enable) {
audio->playingCh1 = 0;
@ -430,7 +432,7 @@ void GBAudioWriteNR52(struct GBAudio* audio, uint8_t value) {
audio->p->memory.io[REG_NR51] = 0;
audio->p->memory.io[REG_NR52] &= ~0x000F;
}
} else {
} else if (!wasEnable) {
audio->frame = 7;
}
}
@ -725,14 +727,14 @@ static void _updateEnvelope(struct GBAudioEnvelope* envelope) {
static bool _updateSweep(struct GBAudioChannel1* ch, bool initial) {
if (initial || ch->time != 8) {
if (ch->direction) {
int frequency = ch->control.frequency;
if (ch->direction) {
frequency -= frequency >> ch->shift;
if (frequency >= 0) {
if (!initial && frequency >= 0) {
ch->control.frequency = frequency;
ch->realFrequency = frequency;
}
} else {
int frequency = ch->control.frequency;
frequency += frequency >> ch->shift;
if (frequency < 2048) {
if (!initial && ch->shift) {
@ -740,6 +742,7 @@ static bool _updateSweep(struct GBAudioChannel1* ch, bool initial) {
if (!_updateSweep(ch, true)) {
return false;
}
ch->realFrequency = frequency;
}
} else {
return false;